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USMLE Step 3 Endocrine System — practice questions

Explore 29 free Endocrine System questions in USMLE Step 3 Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Endocrine System questions and exercises with answers

Showing questions 1–29 of 29.

Compared with neural signalling, endocrine signalling is generally described as:Read the answer and worked solution →Compared with the nervous system, the endocrine system usually acts:Read the answer and worked solution →Glands that release hormones without ducts are described as:Read the answer and worked solution →Sweat and sebaceous glands release their secretions through ducts, making them:Read the answer and worked solution →Hormones secreted into extracellular fluid then diffuse into the lymph or the:Read the answer and worked solution →Hormones made by modifying a single amino acid are classed as:Read the answer and worked solution →The pineal hormone derived from tryptophan that helps set circadian rhythm is:Read the answer and worked solution →Hormones built from short chains of amino acids are classed as:Read the answer and worked solution →Steroid hormones such as testosterone are derived from the lipid:Read the answer and worked solution →Because they are not water soluble, steroid hormones travel in blood bound to a:Read the answer and worked solution →Receptors located inside the cell can only be reached by hormones able to cross the cell:Read the answer and worked solution →Water-soluble hormones cannot cross that barrier, so they bind receptors at the cell:Read the answer and worked solution →The second messenger used by most hormones is cyclic adenosine:Read the answer and worked solution →One common alternative second messenger system instead uses ions of:Read the answer and worked solution →When one hormone enables another to act, the interaction is called:Read the answer and worked solution →When two hormones with similar effects amplify each other, the interaction is called:Read the answer and worked solution →When two hormones oppose each other, the interaction is called:Read the answer and worked solution →The two pancreatic hormones given as that example are glucagon and:Read the answer and worked solution →Secretion halted once hormone levels are adequate describes a loop that is:Read the answer and worked solution →Changes in blood levels of nutrients or ions that trigger hormone release are stimuli that are:Read the answer and worked solution →Activation of the fight-or-flight response by the sympathetic nervous system is an example of stimuli that are:Read the answer and worked solution →Catch the hormone classesRead the answer and worked solution →Pop the hormone stimuliRead the answer and worked solution →Run the hormone gatesRead the answer and worked solution →Slice the endocrine wordsRead the answer and worked solution →Steroid or water solubleRead the answer and worked solution →Sort the endocrine wordsRead the answer and worked solution →Type the numberRead the answer and worked solution →Endocrine bingoRead the answer and worked solution →

Worked practice questions

Compared with neural signalling, endocrine signalling is generally described as:

  1. Less specific
  2. Less similar
  3. Less sizeable
  4. Less standard
Show answer and solution

Correct answer: A. Less specific

1. The same hormone may act on several tissues. 2. Its role depends on which target cells respond. 3. So endocrine signalling is less specific. _Source: OpenStax Anatomy and Physiology 2e, Chapter 17, The Endocrine System._

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Compared with the nervous system, the endocrine system usually acts:

  1. Steadier
  2. Slower
  3. Sooner
  4. Sharper
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Correct answer: B. Slower

1. Nerves handle quick responses to outside change. 2. Hormones look after the internal environment. 3. So the endocrine system acts slower. _Source: OpenStax Anatomy and Physiology 2e, Chapter 17, The Endocrine System._

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Glands that release hormones without ducts are described as:

  1. Ductless
  2. Doubtless
  3. Dateless
  4. Dustless
Show answer and solution

Correct answer: A. Ductless

1. Exocrine glands secrete through ducts. 2. Endocrine glands release into the fluid around them. 3. So endocrine glands are ductless. _Source: OpenStax Anatomy and Physiology 2e, Chapter 17, The Endocrine System._

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